package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @Description:
 * @Title: CategoryServiceImpl
 * @Package com.itheima.reggie.service.impl
 * @Author: 🐟
 * @Copyright 🐟
 * @CreateTime: 2022/9/12 10:47
 */
@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;
    @Autowired
    private CategoryMapper categoryMapper;

    @Override
    public void remove(String id) {
        LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
        lqw.eq(Dish::getCategoryId,id);
        int count = dishService.count(lqw);
        if(count>0){
            //不能删除，业务异常
            throw new CustomException("业务异常,该分类关联有菜品，不能删除");
        }
        LambdaQueryWrapper<Setmeal> lqw2 = new LambdaQueryWrapper<>();
        lqw2.eq(Setmeal::getCategoryId,id);
        int count2 = setmealService.count(lqw2);
        if(count2>0){
            //不能删除，业务异常
            throw new CustomException("业务异常");
        }
        //程序到这里，说明该分类没有关联菜品和套餐

        categoryMapper.deleteById(id);
    }
}
